Barcode Refactor (#3640)

* define a simple model mixin class for barcode

* Adds generic function for assigning a barcode to a model instance

* StockItem model now implements the BarcodeMixin class

* Implement simple unit tests for new code

* Fix unit tests

* Data migration for uid field

* Remove references to old 'uid' field

* Migration for removing old uid field from StockItem model

* Bump API version

* Change lookup_barcode to be a classmethod

* Change barcode_model_type to be a class method

* Cleanup for generic barcode scan and assign API:

- Raise ValidationError as appropriate
- Improved unit testing
- Groundwork for future generic implementation

* Further unit tests for barcode scanning

* Adjust error messages for compatibility

* Unit test fix

* Fix hash_barcode function

- Add unit tests to ensure it produces the same results as before the refactor

* Add BarcodeMixin to Part model

* Remove old format_barcode function from Part model

* Further fixes for unit tests

* Add support for assigning arbitrary barcode to Part instance

- Simplify barcode API
- Add more unit tests

* More unit test fixes

* Update unit test

* Adds generic endpoint for unassigning barcode data

* Update web dialog for unlinking a barcode

* Template cleanup

* Add Barcode mixin to StockLocation class

* Add some simple unit tests for new model mixin

* Support assigning / unassigning barcodes for StockLocation

* remove failing outdated test

* Update template to integrate new barcode support for StockLocation

* Add BarcodeMixin to SupplierPart model

* Adds QR code view for SupplierPart

* Major simplification of barcode API endpoints

- Separate existing barcode plugin into two separate classes
- Simplify and consolidate the response from barcode scanning
- Update unit testing

* Yet more unit test fixes

* Yet yet more unit test fixes

InvenTree/templates/js/translated/barcode.js

@@ -352,19 +352,17 @@ function barcodeScanDialog() {
 
 
 /*
- * Dialog for linking a particular barcode to a stock item.
+ * Dialog for linking a particular barcode to a database model instsance
  */
-function linkBarcodeDialog(stockitem) {
+function linkBarcodeDialog(data, options={}) {
 
     var modal = '#modal-form';
 
     barcodeDialog(
-        '{% trans "Link Barcode to Stock Item" %}',
+        options.title,
         {
             url: '/api/barcode/link/',
-            data: {
-                stockitem: stockitem,
-            },
+            data: data,
             onScan: function() {
 
                 $(modal).modal('hide');
@@ -376,13 +374,13 @@ function linkBarcodeDialog(stockitem) {
 
 
 /*
- * Remove barcode association from a device.
+ * Remove barcode association from a database model instance.
  */
-function unlinkBarcode(stockitem) {
+function unlinkBarcode(data, options={}) {
 
     var html = `<b>{% trans "Unlink Barcode" %}</b><br>`;
 
-    html += '{% trans "This will remove the association between this stock item and the barcode" %}';
+    html += '{% trans "This will remove the link to the associated barcode" %}';
 
     showQuestionDialog(
         '{% trans "Unlink Barcode" %}',
@@ -391,13 +389,10 @@ function unlinkBarcode(stockitem) {
             accept_text: '{% trans "Unlink" %}',
             accept: function() {
                 inventreePut(
-                    `/api/stock/${stockitem}/`,
+                    '/api/barcode/unlink/',
+                    data,
                     {
-                        // Clear the UID field
-                        uid: '',
-                    },
-                    {
-                        method: 'PATCH',
+                        method: 'POST',
                         success: function() {
                             location.reload();
                         },